CHARGE-1/2 FERMIONS AND THE SU(4) COLOR MODEL

1992 ◽  
Vol 07 (15) ◽  
pp. 1315-1323 ◽  
Author(s):  
ROBERT FOOT ◽  
OSCAR F. HERNÁNDEZ
Keyword(s):  
Symmetry Breaking ◽  
Mass Range ◽  
Electroweak Symmetry Breaking ◽  
Low Energy ◽  
Color Model ◽  
Electroweak Symmetry ◽  
The Standard Model ◽  
Energy Theory ◽  
Electrically Charged ◽  
Breaking Scale

The SU(4) color models represent possible alternatives to the standard model. These theories replace the color gauge group SU(3) c by SU(4) c . The SU(4) c symmetry is assumed to be broken which leads to the SM as the effective low energy theory. An interesting feature of these theories is that the SU(4) symmetry breaking scale can be very low, and may be approximately at the same scale as the electroweak symmetry breaking. These models imply the existence of exotic electrically charged ±1/2 fermions. We examine various SU(4) c models to explore the circumstances under which these models can have the exotic charged fermions in the interesting mass range m≳100 GeV .

scholarly journals Constraining the gauge and scalar sectors of the doublet left-right symmetric model

2020 ◽  
Vol 2020 (9) ◽  
Author(s):  
Véronique Bernard ◽  
Sébastien Descotes-Genon ◽  
Luiz Vale Silva
Keyword(s):  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Symmetric Model ◽  
Electroweak Symmetry ◽  
Gauge Bosons ◽  
Spontaneous Breakdown ◽  
The Standard Model ◽  
Low Energies ◽  
Precision Observables ◽  
Electroweak Precision

Abstract We consider a left-right symmetric extension of the Standard Model where the spontaneous breakdown of the left-right symmetry is triggered by doublets. The electroweak ρ parameter is protected from large corrections in this Doublet Left-Right Model (DLRM), contrary to the triplet case. This allows in principle for more diverse patterns of symmetry breaking. We consider several constraints on the gauge and scalar sectors of DLRM: the unitarity of scattering processes involving gauge bosons with longitudinal polarisations, the radiative corrections to the muon ∆r parameter and the electroweak precision observables measured at the Z pole and at low energies. Combining these constraints within the frequentist CKMfitter approach, we see that the fit pushes the scale of left-right symmetry breaking up to a few TeV, while favouring an electroweak symmetry breaking triggered not only by the SU(2)L×SU(2)R bi-doublet, which is the case most commonly considered in the literature, but also by the SU(2)L doublet.

scholarly journals HIGGS–ANTI-DE SITTER SPACETIME BUBBLES FROM SPONTANEOUS Z2-VIOLATION AT ELECTROWEAK SYMMETRY BREAKING SCALE

2004 ◽  
Vol 13 (04) ◽  
pp. 641-657 ◽  
Author(s):  
CIPRIAN DARIESCU
Keyword(s):  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
De Sitter Spacetime ◽  
Electroweak Symmetry ◽  
De Sitter ◽  
Frw Universe ◽  
Closed Form Solutions ◽  
Sitter Spacetime ◽  
Friedmann Robertson Walker ◽  
Breaking Scale

The Einstein–Gordon equations for Friedmann–Robertson–Walker (FRW) geometries in feedback reaction with the quartically self-interacting physical field, arisen from the spontaneous Z2-symmetry breaking, are explicitly formulated. The fixed point exact solutions to the "inner parity" non-invariant Einstein–Gordon system (mandatory) describe (k=-1)-FRW manifolds which actually are either Milne or anti-de Sitter Universes. Setting the Z2-invariance breaking scale at one of the electroweak symmetry, we speculate on the cosmological implications of the Higgs–anti-de Sitter bubbles and derive a set of closed-form solutions to the S2-cobordism with a spatially-flat FRW Universe.

scholarly journals A SUPERSYMMETRIC MODEL WITH THE GAUGE SYMMETRY SU(3)1 × SU(2)1 × U(1)1 × SU(3)2 × SU(2)2 × U(1)2

2003 ◽  
Vol 18 (14) ◽  
pp. 967-975 ◽  
Author(s):  
J. G. KÖRNER ◽  
CHUN LIU
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Supersymmetry Breaking ◽  
Simple Form ◽  
Electroweak Symmetry Breaking ◽  
Supersymmetric Model ◽  
Electroweak Symmetry ◽  
Gauge Groups ◽  
The Standard Model

A supersymmetric model with two copies of the Standard Model gauge groups is constructed in the gauge mediated supersymmetry breaking scenario. The supersymmetry breaking messengers are in a simple form. The Standard Model is obtained after first step gauge symmetry breaking. In the case of one copy of the gauge interactions being strong, a scenario of electroweak symmetry breaking is discussed, and the gauginos are generally predicted to be heavier than the sfermions.

scholarly journals Towards completing the standard model: Vacuum stability, electroweak symmetry breaking, and dark matter

2014 ◽  
Vol 89 (1) ◽  
Author(s):  
Emidio Gabrielli ◽  
Matti Heikinheimo ◽  
Kristjan Kannike ◽  
Antonio Racioppi ◽  
Martti Raidal ◽  
...  
Keyword(s):  
Dark Matter ◽  
Standard Model ◽  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Vacuum Stability ◽  
The Standard Model

THE ONE-PARAMETER MODEL AT LHC

2011 ◽  
Vol 26 (02) ◽  
pp. 87-100
Author(s):  
JAMES MAXIN ◽  
VAN E. MAYES ◽  
D. V. NANOPOULOS
Keyword(s):  
Large Hadron Collider ◽  
Symmetry Breaking ◽  
Hadron Collider ◽  
Susy Breaking ◽  
Electroweak Symmetry Breaking ◽  
Electroweak Symmetry ◽  
Brane Model ◽  
String Compactifications ◽  
The One ◽  
Breaking Scale

No-scale supergravity is a framework where it is possible to naturally explain radiative electroweak symmetry breaking and correlate it with the effective SUSY breaking scale. Many string compactifications have a classical no-scale structure, resulting in a one-parameter model (OPM) for the supersymmetry breaking soft terms, which results in a highly constrained subset of mSUGRA. We investigate the allowed supersymmetry parameter space for a generic one-parameter model taking into account the most recent experimental constraints. We also survey the possible signatures which may be observable at the Large Hadron Collider (LHC). Finally, we compare collider signatures of OPM to those from a model with non-universal soft terms, in particular those of an intersecting D6-brane model.

scholarly journals Low-energy signals of strongly-coupled electroweak symmetry-breaking scenarios

2016 ◽  
Vol 93 (5) ◽  
Author(s):  
Antonio Pich ◽  
Ignasi Rosell ◽  
Joaquín Santos ◽  
Juan José Sanz-Cillero
Keyword(s):  
Symmetry Breaking ◽  
Electroweak Symmetry Breaking ◽  
Low Energy ◽  
Electroweak Symmetry ◽  
Strongly Coupled

Links between flavor and electroweak symmetry breaking

2014 ◽  
Vol 29 (21) ◽  
pp. 1444007
Author(s):  
George Wei-Shu Hou
Keyword(s):  
Symmetry Breaking ◽  
Scale Invariance ◽  
Vector Boson ◽  
New Physics ◽  
Electroweak Symmetry Breaking ◽  
Fermion Mass ◽  
Electroweak Symmetry ◽  
Mass Generation ◽  
Gap Equation ◽  
The Standard Model

Fermion mass generation in the standard model was invented by Weinberg, while it is an old notion that strong Yukawa coupling could be the agent of electroweak symmetry breaking. Observation of the 126 GeV boson has crashed the prospects for such a heavy chiral quark doublet Q. However, the dilaton possibility can only be ruled out by confirming vector boson fusion with Run 2 data at the LHC, which starts only in 2015. We recast the [Formula: see text] condensation scenario as Fermi–Yang model v2.0. A Gap Equation has been constructed, with numerical solution demonstrating dynamical mQ generation; scale invariance of this equation may be consistent with a dilaton. Other consequences to be checked are [Formula: see text] "annihilation stars," and enhanced Bd →μ+μ-, KL →π0νν, and possibly sin ϕs. If verified in Nature, the Agent of BEH mechanism would differ from current perception, the 126 GeV boson would be the first New Physics at the LHC, and we would have enough CP violation for baryogenesis.

Sign in / Sign up

Export Citation Format

Share Document